Table 1.

Frequency of causes in the study group.

Etiology	No.	Percentage
Idiopathic	20	38.5
DM	27	52
RVO	2	3.8
CNV	2	3.8
Traumatic	1	1.9
Total	52	100

DM, diabetes mellitus; RVO, retinal vein occlusion; CNV, choroidal neovascularization.